ИСТИНА

•The aim of the study is to analyze abiotic factors on reservoir blooming by used the results of modeling the long term growth of phytoplankton in the Mozhaysk reservoir near Moscow. For blue-green algae significant correlations were found with hydrological factors: - the volume of water inflow during summer and autumn floods, - the coefficient of water exchange of the reservoir in high water, and the rate of intra-water transport of water masses. - wind speed and the number of calm days -ratio of the volume of water in the reservoir at the end of its winter working with the volume of flood waters.